Physics, 19.10.2021 20:50 cthompson1107
1: Hai thành phố A và B cách nhau 250km. Lúc 7h sáng,2 ô tô khởi hành từ hai thành
phố đó hướng về nhau. Xe từ A có vận tốc v1 = 60km/h, xe kia có vận tốc v2 = 40
km/h. Hỏi 2 ô tô sẽ gặp nhau lúc mấy giờ? tại vị trí cách B bao nhiêu km?
Answers: 1
Physics, 23.06.2019 05:30
Oxygen gas enters well-insulated diffuser at 25 lbf/in.2, 420r, with a velocity of 860 ft/s through a flow area of 1.6 in.^2. at the exit, the flow area is 12 times the inlet area, and the velocity is 19 ft/s. the potential energy change from inlet to exit is negligible. assuming ideal gas behavior for the oxygen and steady-state operation of the diffuser, determine the following: (a) the exit temperature, in r(b) the exit pressure, in lbf/in.^2 (c) the mass flow rate, in lb/s
Answers: 3
Physics, 23.06.2019 10:40
This battery has a difference in potential energy between the positive terminal and negative terminal which units express this difference in energy
Answers: 3
Physics, 23.06.2019 15:00
Basilisk lizards can run across the top of a water surface (see the figure). with each step, a lizard first slaps its foot against the water and then pushes it down into the water rapidly enough to form an air cavity around the top of the foot. to avoid having to pull the foot back up against water drag in order to complete the step, the lizard withdraws the foot before the water can flow into the air cavity. if the lizard is not to sink, the average upward impulse on the lizard during this full action of slap, downward push, and withdrawal must match the downward impulse due to the gravitational force. suppose the mass of a basilisk lizard is 93.7 g, the mass of each foot is 3.37 g, the speed of a foot as it slaps the water is 1.15 m/s, and the time for a single step is 0.531 as. (a) what is the magnitude of the impulse on the lizard during the slap
Answers: 3
1: Hai thành phố A và B cách nhau 250km. Lúc 7h sáng,2 ô tô khởi hành từ hai thành
phố đó hướng về...
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